Portable saw



F. M. LA'sERsoN.

PORTABLE sAvy. APPLICATION IIILED DEC.30, I9I

PatentedSept. 14, 1920.

PATENT OFFICE.

FREDERICK MAURICE LASEBSON, OF NEW YORK, N. Y.

PORTABLE SAW.

Specification of Letters Patent. Patented Sept. 14, 1920.

Application led December 90., 1918. Serial No. 268,790.

To all 'whom t may concern.'

Be it known that I, FREDERICK MAURICE LAsERsoN, a subject of the King ofEngland, residin at 100 Fifth avenue, city, county, and tate of NewYork, U. S. A., have invented new and luseful Improvements in PortableSaws, of which the following is a specification.

This invention relates to portable saws.

rIhe object of the invention is toprovide a power driven saw soconstructed and arranged that it may be operated where the ordinary sawscannotY be used. A further object is toprovide a base and support forsuch a saw, and a mounting thereon for the saw blade and its operatingmeans which will permit the saw blade to be moved with relation to itsbase or support. A more specific object is to provide means forindieating the depth of the cut of the saw and also ,means for limitingthe depth of the cut.

rlhe invention consists of the construction, combination and arrangementof parts, as herein illustrated, described and claimed.

ln the accompanying drawings, forming part hereof, is illustrated a formof ernbodiment of the invention and one modification, in which drawingssimilar reference characters designate corresponding parts and in which:

Figure 1 is a side elevation;

Fig. 2 is a plan view;

Fig.- 3 is a horizontal section, taken approniniately on line 3 3 ofFig. 1 looking in the direction indicated by the arrows.

Referring to the drawings, 1 designates i a standard to which areaiiixed feet 2. The

feet 2 are pivoted on the standard 1 so that they may swing entirelyaround the standard, and are maintained thereon by means of a cap 3 heldin place by a screw 3a.

A bar l has one end secured to the stand- 4 ard 1 midway of its lengthand at its outer a scale 7.

A loop 8`is formed -on the opter end of a handle 9 and isslidably disosed on the pin 5, vso as to slide freely t ereon.- The downwardmovement of the loop 8 is limited by means of the stop 6, land the scale7 indicates the movement Yof the handle 9 and i Asaw blade hereinafterdescribed.

in consequence the depth of the cut of the Adjacent its upper end thestandard 1 is provided with a slotA 10 to form a guide for the inner endof the handle 9 in its vertical movement.

A supporting rod 11 is disposed parallel to and adjacent the standard 1so as to slide through a guide 12 which is secured to the upper end ofthe standard 1. Midway `its length the rod 11 is secured to the eX-treme inner end of the handle 9, as at 413, so that movement of thehandle 9 is cmmunicated to the supporting rod 11. The lower end of thesupporting rod 11 works through a loop 14 formed on the inner end of thebar f1, which loop and the guide member 12 form a guiding means for thesupporting rod 11. The lower end` of the supporting rod 11 is secured asat 15 to a casing 16, which casing is connected to or forms a part of amotor'l?, which motor has itsupper end securedas at 18 to the upper endof the supporting rod 11. Vertical. movement of the supporting rod 11carries with it the motor and the casing, and all of their connectedYparts. A coiled spring 19 disposed around the supporting rod 11 normallymaintains the parts in an elevated position so that the saw blade 20does not extend below the lowerline of the base formed by the feet 2. Ashaft 21 is carried in a bearing 22 and the saw blade 20 is securedthereon as by means of a nut 23. A beveled pinion 24 is secured on theshaft 21 and is arranged to mesh with a gear 25 on the shaft 26 of themotor 17.

The device is operated by placing the base formed by the feet 2 upon thedoor, ceiling, or partition 27, starting the motor and pressing Qny the'handle 9 to force the I saw blade 2O therein.

what is c aimed as new and desired to secure bv Letters Patent 1s:

1. A portable saw comprising a standard,

ido

a pair of feet pivotcd thereto at the base v thereof, said feet beingadjustable Von said ivot in a plane perpendicular to the plane of thesaid standard, a horizontally disposed transverse bar secured to saidstandard, and forming a guide to the one side thereof, a second guidesecured to the top of said standard, a motor supporting member adaptedto move in said guides, a motor secured to saidsupporting member, a sawmounted in the latter, means for rotating said saw from the said motor,a spring, for maintaining said motor and saw 1n normally raised positionwith respect to the said standard and means for brin 'ng the said sawinto contact with the wo 2. A portable saw comprising a standard, feetpivoted to said standard at the base thereof and arranged to operate ina plane perpendicular to the plane of the said standard, means foradjusting the position of the plurality.

feet with respect to the standard, a of guides secured to the saidstandard, a member adapted to move in said guides,a saw, a motor fordriving the same, means for supporting said motor and saw on the saidmember, a spring on the latter for maintaining the motor and saw ininactive position and a. handle secured tothe said memberior operatingthe saw.

3. A portable saw comprising a standard,

a member secured thereto transversely there- 4 of and forming a guide tothe Aone side of the said standard, a second guide on the latter, a saw,amotor for driving `the same,

the plane of the said standard, a motor and n saw blade disposed abovesaid feet and arranged to have movement with respect thereto, a springfor-maintaining said motor and saw in normally raised inactive position,a handle disposed at an angle to the said standard for operating saidsaw and means for limitingA and measuring the said movement of the saw.

In testimony 'whereof I have signed my name to` this specication..

FREDERICK MAURICE LASERSON.

